<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <div>那行吧</div>
      <div id="box" style="width: 800px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
import * as echarts from 'echarts'
import _ from 'lodash'

export default {
  data() {
    return {
      // 需要和后端数据合并的数据项(用lodash的merge方法合并)
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value',
            axisLine: {
              show: true
            }
          }
        ]
      }
    }
  },
  created() {},
  // 生命钩子函数，页面渲染完毕触发
  async mounted() {
    const myChart = echarts.init(document.getElementById('box'))

    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status !== 200) return this.$message.error('获取折线图失败')
    // 准备数据和配置项(后端数据和配置项合并)
    const result = _.merge(res.data, this.options)

    myChart.setOption(result)
  }
}
</script>

<style lang="less" scoped>
</style>
